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Meaning of arthrodire

ar•thro•dire

Pronunciation: (är'thru-dīr"), [key]
— n.
  1. any of numerous fishes of the extinct order Arthrodira, widely distributed during the Devonian Period, having the anterior part of the body covered by a shield of bony plates.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.